Mars Attacks Sketch cover

with it being October I am trying to keep every thing kinda spooky, Or Halloween adjacent at the very least.  This week is a Mars attacks cover.  I originally wanted to do a Mars attacks John carter mash up.  But as I was doing a rough sketch I thought it would be so much cooler to do Marvin the Martian.  The sword behind Marvin is John Carters sword.  I had a lot of fun doing this sketch cover.